The 12-round co-main event will feature a pair of top bantamweights, as Puerto Rican Olympian McJoe Arroyo (16-0, 8 KOs) and Arthur Villanueva (27-0, 14 KOs), of the Philippines put their undefeated records on the line for the IBF Bantamweight World Championship.

Chavez Jr. blew the weight limit, which was contracted originally for the super middleweight limit of 168-pounds, and then later moved up to 169-pounds, and then eventually to 170. He came in at 170.8-pounds. Reyes was 168.4-poounds.

Arroyo was 114.8-pounds on the nose and Villanueva was the same.

Imam came in at 140-pounds on the limit, while Angulo matched the same on the scale.